Tool for backing up the entire Blogger site

It seems like wikipedia.org is going to be unblocked recently, and I can already access the English version of Wikipedia without a proxy. There have been quite a lot of discussions about this issue online recently. Some people are worried that it might just be a temporary phenomenon, leading to false hope. So, I started thinking about what would happen if blogspot.com were suddenly blocked again one day. Therefore, I think there should be a program that can back up the entire site. This program I created was actually modified from an example included in the Google API, but sometimes it doesn't run successfully, so you need to try multiple times. Currently, it can only capture HTML code, and I will look into making a program that can also download images when I have time.